import time

import streamlit as st

# 嵌套布局实战
main_col, side_col = st.columns([3, 1])
with main_col:
    st.title("主要内容")
    sub_col1, sub_col2 = st.columns(2)
    with sub_col1:
        st.info("子列 1")
with side_col:
    st.success("侧边栏")
